If it's not what You are looking for type in the equation solver your own equation and let us solve it.
840-484=x
We move all terms to the left:
840-484-(x)=0
We add all the numbers together, and all the variables
-1x+356=0
We move all terms containing x to the left, all other terms to the right
-x=-356
x=-356/-1
x=+356
| 5x+42=177 | | -w/8=-54 | | 2x-74=-6x+78 | | ⅓(6x+18)=-24 | | 3x+4x=5(x-2) | | 5x-6=5x+14 | | −4d/5=8/5 | | 3x^2=22x-24 | | 78+x=129 | | 4+2.2h=-3 | | 9y2−40y−25=0 | | 9.94=1.25x | | 67x+34=369 | | 11x-100=116+3x | | 2x-3-6×=12 | | 0.1x+.9=6+0.2x | | 0.3x+39.1=58 | | 1x+2.5x=100 | | −0.012x=−6 | | 9x-15=-87 | | 5/6w+1/3=2/3w | | 11x+10x+12=180 | | 74=-14-(-5k) | | 10*2x=108 | | 3^x=4.551196133 | | 1/2(8x+56)=20 | | w-11/5=2/9 | | 14-4x=66 | | 15x-23=11x+21 | | z-(-3)=-8 | | 22x−45=93 | | 5x/5=23/5 |